Abstract: A first connector includes a first insulative housing defining opposite first and second mating faces, a set of first upper contacts arranged upon the first mating face, a set of first lower contacts including a first lower differential pairs, a second lower differential pairs and a lower grounding contact, and a first grounding plate. The contacting sections and the first grounding arm are arranged upon the second mating face, and the first terminal portions of the first lower differential pairs are arranged in a first row, and the second terminal portions of the second lower differential pairs and the tail section of the lower grounding contact are arranged in a second row for excellent high-frequency characteristics.

Abstract: The use of statistics collected during the parallel distributed execution of the tasks of a job may be used to optimize the performance of the task or similar recurring tasks. An execution plan for a job is initially generated, in which the execution plan includes tasks. Statistics regarding operations performed in the tasks are collected while the tasks are executed via parallel distributed execution. Another execution plan is then generated for another recurring job, in which the additional execution plan has at least one task in common with the execution plan for the job. The additional execution plan is subsequently optimized based at least on the statistics to produce an optimized execution plan.

Abstract: An electrical connector assembly comprises a first connector unit and a second connector. The first connector unit comprises a first connector having an insulative housing with a plurality of contacts mounted thereon. A printed circuit board, on which the first connector is seated, defines a pair of mounting sections at opposite ends thereof and locate adjacent to the first connector. An insulative cover is attached to a first surface of the printed circuit board which is opposite to the first connector. The insulative cover forms a pair of guiding posts retained in said mounting sections and a pair of stand-off sections located at opposite ends thereof for supporting the first connector during the mating process. A metallic cover is attached to the insulative cover. The second connector defines a pair of guiding apertures at opposite ends thereof for receiving said guiding posts.

Abstract: A first connector includes a first insulative housing defining opposite first and second mating faces, a set of first upper contacts arranged upon the first mating face, a set of first lower contacts including a first lower differential pairs, a second lower differential pairs and a lower grounding contact, and a first grounding plate. The contacting sections and the first grounding arm are arranged upon the second mating face, and the first terminal portions of the first lower differential pairs are arranged in a first row, and the second terminal portions of the second lower differential pairs and the tail section of the lower grounding contact are arranged in a second row for excellent high-frequency characteristics.

Abstract: Systems and methods that enable resolving deadlock cycles by victim selection based on cost and/or priority of strongly connected components in a static wait-for graph. As such, victims can be selected by iteratively estimating total deadlock resolution cost (based on cost of strongly connected components) for remaining deadlock participants, selecting the participant with the least estimated total cost as the next victim, and reducing the wait-for graph after removing the victim vertex. The victim selection algorithm can be a cost-based greedy algorithm, wherein during each victim selection iteration, a single optimal victim is selected based on estimated remaining cost.

Abstract: A method of updating a clone data map associated with a plurality of nodes of a computer system is disclosed. The clone data map includes node identification data and clone location data. A node failure event of a failed node of the computer system that supports a primary clone is detected. The clone data map is updated such that a secondary clone stored at a node other than the failed node is marked as a new primary clone. In addition, clone data maps may be used to perform node load balancing by placing a substantially similar number of primary clones on each node of a node cluster or may be used to increase or decrease a number of nodes of the node cluster. Further, data fragments that have a heavy usage or a large fragment size may be reduced in size by performing one or more data fragment split operations.

Abstract: Aspects of the subject matter described herein relate to deadlock detection in distributed environments. In aspects, nodes that are part of the environment each independently create a local wait-for graph. Each node transforms its local wait-for graph to remove non-global transactions that do not need resources from multiple nodes. Each node then sends its transformed local wait-for graph to a global deadlock monitor. The global deadlock monitor combines the local wait-for graphs into a global wait-for graph. Phantom deadlocks are detected and removed from the global wait-for graph. The global deadlock monitor may then detect and resolve deadlocks that involve global transactions.

Abstract: A method of estimating cardinality of a join of tables using multi-column density values and additionally using coarser density values of a subset of the multi-column density attributes. In one embodiment, the subset of attributes for the coarser densities is a prefix of the set of multi-column density attributes. A number of tuples from each table that participate in the join may be estimated using densities of the subsets. The cardinality of the join can be estimated using the multi-column density for each table and the estimated number of tuples that participate in the join from each table.

Abstract: An electrical connector (100) for mounting to a printed circuit board comprises an insulative housing (10) and a plurality of terminals (30) received in the housing. The housing comprises a pair of sidewalls (14) each defining a plurality of first passageways (128) and a tongue (12) located between the sidewalls. Each of the terminals comprises a positioning portion (34), a contact portion (32), and a tail (35). The positioning portion is received in the first passageway. The contact portion is attached to a surface of the tongue. The tail extends beyond the housing. The positioning portion interferentially engages with the first passageway in a longitudinal direction to restrict the terminal from moving along the longitudinal direction of the housing.

Abstract: An electrical connector (100) for fixing to a printed circuit board includes an insulative housing (10) and a number of terminals (30) received in the housing. The housing includes a tongue (12) defining a number of first passageways (122). Each of the terminals includes a retention portion (31), a contact portion (32), and a tail (34). The retention portion is received in the first passageway. The contact portion is attached to a surface of the tongue. The tail horizontally extends beyond the housing. The terminals engage with the housing securely.

Abstract: An electrical connector (100) for mounting to a printed circuit board comprises an insulative housing (10) and a plurality of terminals (30) received in the housing. The housing comprises a pair of sidewalls (14) each defining a plurality of first passageways (128) and a tongue (12) located between the sidewalls. Each of the terminals comprises a positioning portion (34), a contact portion (32), and a tail (35). The positioning portion is received in the first passageway. The contact portion is attached to a surface of the tongue. The tail extends beyond the housing. The positioning portion interferentially engages with the first passageway in a longitudinal direction to restrict the terminal from moving along the longitudinal direction of the housing.

Abstract: A method of estimating cardinality of a join of tables using multi-column density values and additionally using coarser density values of a subset of the multi-column density attributes. In one embodiment, the subset of attributes for the coarser densities is a prefix of the set of multi-column density attributes. A number of tuples from each table that participate in the join may be estimated using densities of the subsets. The cardinality of the join can be estimated using the multi-column density for each table and the estimated number of tuples that participate in the join from each table.

Abstract: A board-to-board electrical connector assembly consists of a plug connector connected to a daughter board and a receptacle connector connected to a mother board. The receptacle connector has a first housing with a top face connected to the mother board and a bottom face connected to the plug connector, a pair of metal shields mounted to a front and rear face of the first housing, respectively, and a number of contacts fixedly received in contact passageways of the first housing. Each metal shield is integrally formed with two lateral sections each including an upper solder pad soldered to a grounding circuit of the mother board, and a leg covering a corresponding lateral wall of the first housing and defining an engaging foot, and a body portion between the two lateral sections. The body portion is formed with a bent line between and parallel to an upper and lower edge of the body portion.

Abstract: An electrical connector for a flexible flat cable comprises a dielectric housing defining an elongate slot, a number of terminals retained in the housing, a shield enclosing the housing, and a stuffer inserted into the slot for biasing the inserted flexible flat cable into contact with the terminals. Each terminal has a tail portion including upper and lower fingers for connecting with signal conductors of the inserted cable. The shield comprises a pressing plate extending into the slot of the housing. The pressing plate connects with a bottom wall of the shield via a pair of linkers and is parallel to the bottom wall. The stuffer comprises a body and a pair of spring latch arms formed on opposite ends thereof. A latching member is formed on an outer surface of each latch arm for guiding and locking the stuffer into the housing. The latching member includes a lead-in ramp, a locking section and a guiding rib.

Abstract: An electrical connector comprises an insulative housing, a plurality of terminals received in the housing, an insulative stuffer and a conductive shield surrounding the housing. The housing comprises a top wall, a bottom wall, two side walls and a baffle between the top wall and the bottom wall. A receptacle and a plurality of channels are defined between the top wall and the baffle. A slot and a plurality of passageways are defined between the baffle and the bottom wall. Each terminal has an upper positioning portion and a contact portion both received in a corresponding channel, and a lower positioning portion received in a corresponding passageway. The shield is of a unitary construction and has a top panel, a bottom panel, a pair of front panels connecting the top panel to the bottom panel, and a pair of lateral panels together defining a space for enclosing the housing.

Abstract: An electrical connector for connection with a flexible cable comprises an elongate insulative housing, a plurality of terminals retained in the housing and a stuffer. A pair of retention holes is formed at opposite ends of the stuffer corresponding to teeth at opposite ends of the housing. Each terminal includes a mating end and a mounting tail upwardly deformed. The stuffer is mounted to the housing with the teeth engaging in the holes. An end of the flexible cable is inserted into the connector for contacting the terminals. The stuffer is downwardly pushed to press against the flexible cable to engage with the mounting portions and secure the end of the flexible cable within the housing.

Abstract: An electrical connector for connecting a flexible printed circuit (FPC) to a board-mounted connector comprises a dielectric housing, a plurality of generally U-shaped electrical contacts accommodated in the housing and a stuffer mountable to the housing. The housing has a plug portion at one end defining a central portion therein and a receptacle portion at an opposite end defining an elongated channel therein. The contacts laterally straddle the central portion of the plug portion to connect with terminals of the board-mounted connector and are reliably retained by a contact retention structure defined in the central portion. Each contact comprises a curved contacting finger extending into the elongated channel of the receptacle portion. The stuffer is partially inserted into the channel of the receptacle portion to press the FPC against the curved contacting fingers of the contacts situated close to an inner wall of the channel.